Hydrogenation catalyst and preparation method thereof and preparation method of tetrahydrofurfuryl alcohol
A hydrogenation catalyst and hydrogenation reaction technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of increasing cost and separation difficulty, increasing risk, Cumbersome operation and other problems, to achieve high activity and selectivity, simplify the production process, and avoid the separation of solvents
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[0020] In a second aspect, the present invention provides a method for preparing the above hydrogenation catalyst, characterized in that the method comprises:
[0021] 1) Co-precipitate the mixed solution of titanium oxide precursor, zinc oxide precursor and zirconium oxide precursor, wash and dry the obtained precipitate, and shape, dry and roast the carrier powder obtained after drying to prepare carrier;
[0022] 2) Add the carrier prepared in step 1) to the aqueous solution of the ruthenium precursor, then add the alkali solution, control the pH value to 6-9, stir until a black solid is formed, and wash and dry the obtained black solid in sequence and roasting.
[0023] In the present invention, the mixed solution can be prepared by conventional preparation methods in the art. Preferably, the aqueous solution containing the precursor of titanium oxide, the aqueous solution containing the precursor of zinc oxide and the aqueous solution containing the precursor of zirconiu...
Embodiment 1-7
[0048] Prepare 1M TiCl with a pH value of 0.5 4 solution (adjust the pH value with hydrochloric acid), 1.5M Zn(NO 3 ) 2 ·6H 2 O solution and 1.5M ZrOCl 2 ·8H 2 O solution, and then accurately measure the above four solutions according to the component content of the catalyst to form a titanium-zinc-zirconium mixed liquid. The amounts of the various solutions are such that the content of each component in the final prepared catalyst satisfies the values shown in Table 1. Add an appropriate amount of deionized water into the reaction kettle, and under constant stirring, add the silicon-nickel-calcium-zirconium mixed solution and 1M sodium carbonate solution into the reactor in parallel to control the reaction pH value to 8.0. The temperature was raised to 60°C. After the feeding was completed, the heat preservation and stirring was continued for 1 hour until the precipitate was formed. The precipitate was filtered and washed five times, and dried at 110°C for 12 hours to ...
Embodiment 8-14
[0059] The reaction is carried out in a stainless steel reactor to prepare tetrahydrofurfuryl alcohol. Specifically, the hydrogenation catalyst and furfural prepared in the above examples 1-7 are respectively selected for reaction, the reaction temperature is 105 ° C, the hydrogen pressure is 2 MPa, and the furfural liquid space Speed 0.2hr -1 , the hydroaldehyde molar ratio is 15. After the reaction was stable, the reaction result was analyzed by gas chromatography, and the conversion rate of furfural and the selectivity of tetrahydrofurfuryl alcohol were shown in Table 2 below.
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